How much horsepower can the Fiero Stick shift transmissions handle?
A. Generally speaking I have used the following engine/transmission combinations with great success, in fact, I haven t broke a stock Fiero stick shift transmission yet. 1) With the 4-speed trans. ( 84 4 cylinder & 85- 86 V-6 4 speeds) I have used 300+ H.P. engines repeatedly with no problems. 2) With the 85 thru 88 4 cylinder 5 speed transmissions I have used 300+ H.P. engines repeatedly with no problems. 3) With the 86 thru 88 6 cylinder 5 speed transmissions, I have used engines rated at 460+ H.P. (One even had an additional 200 H.P. dual quad carb. NOS system on top of a 460 H.P. 383″ Chevy stroker engine) With no failures yet. One final note on this subject: It is my opinion that: “even though we have had no failures, that any motor vehicle can fail if subjected to severe and constant abuse.
